<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style>
		div{
			width: 200px;
			height: 200px;
			background-color: lightgreen;
			/* display: none; */
			visibility: hidden;
		}
		</style>
	</head>
	<body>
		<div>div</div>
		<button>ok</button>
	</body>
</html>
